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A search for Fermi bursts associated with supernovae and their frequency of occurrence
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2014 (Engelska)Ingår i: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 569, s. A108-Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Context. Observations suggest that most long duration gamma-ray bursts (GRBs) are connected with broad-line supernovae Ib/c, (SNe-Ibc). The presence of GRB-SNe is revealed by rebrightenings emerging from the optical GRB afterglow 10-15 days, in the rest-frame of the source, after the prompt GRB emission. Aims. Fermi/GBM has a field of view (FoV) about 6.5 times larger than the FoV of Swift, therefore we expect that a number of GRB-SN connections have been missed because of lack of optical and X-ray instruments on board of Fermi, which are essential for revealing SNe associated with GRBs. This has motivated our search in the Fermi catalog for possible GRB-SN events. Methods. The search for possible GRB-SN associations follows two requirements: (1) SNe should fall inside the Fermi/GBM error box of the considered long GRB, and (2) this GRB should occur within 20 days before the SN event. Results. We have found five cases within z < 0.2 fulfilling the above reported requirements. One of them, GRB130702A-SN 2013dx, was already known to have a GRB-SN association. We have analyzed the remaining four cases and we have concluded that three of them are, very likely, just random coincidences due to the Fermi/GBM large error box associated with each GRB detection. We found one GRB possibly associated with a SN 1998bw-like source, GRB 120121B/SN 2012ba. Conclusions. The very low redshift of GRB 120121B/SN 2012ba (z = 0 : 017) implies a low isotropic energy of this burst (E-iso = 1 : 39 x 10(48)) erg. We then compute the rate of Fermi low-luminosity GRBs connected with SNe to be rho(0,b) <= 770 Gpc(-3) yr(-1). We estimate that Fermi/GBM could detect 1-4 GRBs-SNe within z <= 0.2 in the next 4 years.

Ort, förlag, år, upplaga, sidor
2014. Vol. 569, s. A108-
Nyckelord [en]
gamma-ray burst: general, supernovae: general
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URN: urn:nbn:se:kth:diva-156131DOI: 10.1051/0004-6361/201424700ISI: 000343092100130Scopus ID: 2-s2.0-84907546772OAI: oai:DiVA.org:kth-156131DiVA, id: diva2:769552
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QC 20141208

Tillgänglig från: 2014-12-08 Skapad: 2014-11-21 Senast uppdaterad: 2017-12-05Bibliografiskt granskad

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